A former communist country in eastern Europe and northern Asia; established in 1922; included Russia and 14 other soviet socialist republics (Ukraine and Byelorussia and others); officially dissolved 31 December 1991.

synonyms: Russia, Union of Soviet Socialist Republics, USSR.

Dutch: Unie van Socialistische Sovjetrepublieken, SU, Sovjet-Unie, Sovjetunie, Sowjet-Unie, USSR
Polish: Związek Sowiecki, Sowiety, Związek Radziecki, Związek Socjalistycznych Republik Radzieckich, ZSRR